Revert [28719] and no longer math-process multiplication of negative numbers

see #19308
fixes #30445
props rmccue

git-svn-id: https://develop.svn.wordpress.org/trunk@30752 602fd350-edb4-49c9-b593-d223f7449a82
Convert various uses of `(optional)` in core parameter descriptions to use the style prescribed in the inline documentation standards for PHP.

The style for marking parameters optional in inline PHP docs is: `@param type $var Optional. Description. Accepts. Default.`, where Accepts can be omitted on a case-by-case basis.

Props coffee2code.
Fixes #30591.


git-svn-id: https://develop.svn.wordpress.org/trunk@30753 602fd350-edb4-49c9-b593-d223f7449a82